Matematică
narcisabanu
24

DAU COROANA! Calculati: a) -4-{-4-[-4-(-4+8)]-(+8-6)} b) -15-{-10-[25-35-(10-15)]+25} c) -50-{200-[100-50-(30-80+10)-80]-30} d) -2-{-2-(-2+4)}-(-4-3) e) (3-7+5)-(-12+5-7) f) (7+8-9)-(2-5+8)-(-2-9+5) g)(-35+18-24)-(8-14+10)-(-35+18)

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(2) Răspunsuri
hfgutfydrg7

a) -4-{-4-[-4-(+4)]-(+2)}=     -4-[-4-(-4-4)]-2=     -4-[-4-(-8)]-2=     -4-(-4+8)-2=     -4-(+4)-2=     -4-4-2=     -10 b) -15-{-10-[25-35-(10-15)]+25}=     -15-{-10-[+25-35-(-5)]+25}=     -15-[-10-(+25-35+5)+25]=     -15-[-10-(-10+5)+25]=     -15-[-10-(-5)+25]=     -15-(-10+5)+25=     -15-(-5)+25=     -15+5+25=     -10+25=     +15 c)-50-{200-[100-50-(30-80+10)-80]-30}=    -50-{200-[100-50-(-50+10)-80]-30}=    -50-{200-[100-50-(-40)-80]-30}=    -50-[200-(+100-50+40-80)-30]=    -50-[200-(+50+40-80)-30]=    -50-[200-(+90-80)-30]=    -50-[200-(+10)-30]=    -50-(+200-10)-30=    -50-(+190)-30=    -50-190-30=-260 d) -2-[-2-(-2+4)]-(-4-3)=     -2-[-2-(+2)]-(-7)=     -2-(-2-2)+7=     -2-(-4)+7=     -2+4+7=     +2+7=+9 e)(3-7+5)-(-12+5-7)=    (-4+5)-(-7-7)=    +1-(-14)=    +1+14=+15 f) (7+8-9)-(2-5+8)-(-2-9+5)=    (+15-9)-(-3+8)-(-11+5)=    +6-(+5)-(-6)=    +6-5+6=    +1+6=+7 g)(-35+18-24)-(8-14+10)-(-35+18)=    (-17-24)-(-6+10)-(-17)=     -7-(+4)+17=     -7-4+17=     -11+17=+6

Aurulroamnei

..-(-(100-50-30+80+10-80)-30]=-50-(200-100+50+30-80-10+80-30)=-50-200+100-50--30+80+10-80+30=-250+100-50+10=-150+50+10=210 d)-2-{-2-(-2+4)]-(-4-3)=-2-[-2+2-4]+4+3=-2+2+2-4+4+3=5 e)1+12-5+7=15 f)6-2+5-8+2+9-5=7 g)-17-24-8+14-10+35-18=-49+49-10-18=-28

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